Poile hammer for driving by impact or by vibratory action



Nov. 22, 1966 I M. HORNSTEIN 3,286,775

PILE HAMMER FOR DRIVING BY IMPACT OR BY VIBRA'IORY ACTION Filed May 20, 1964 5 Sheets-Sheet 1 INVENTOR.

Mosas HOENSTEIN Nov. 22, 1966 M. HORNSTEIN FILE HAMMER FOR DRIVING BY IMPACT OR BY VIBRATORY ACTION Filed May 20, 196.4

5 Sheets-Sheet '2 Ar lL 6..., 76 W- INVENTOR.

Moses HOFQNSTEIN OWM QTTOENE Nov. 22, 1966 M. HORNSTEIN FILE HAMMER FOR DRIVING BY IMPACT OR BY VIBRATORY ACTION Filed May 20, 1964 5 Sheets-Sheet 5 INVENTOR. Moses HORNSTEiN BY g Q'TTOENEY United States Patent 3 286,775 PHE HAMMER FOR DRIVING BY IMPACT OR BY VIBRATORY ACTION Moses Hornstein, Merrick, N.Y., assignor to Horn Pile dz Foundation Corp., Merrick, N.Y., a corporation of New York Fiied May 20, 1964, Ser. No. 368,884 7 Claims. (Cl. 173-48) The invention herein disclosed relates to pile driving hammers and the general objects of the invention are to provide a rig with which piling may be driven either by impact or by vibratory action.

Particularly it is a purpose of the invention to provide a pile driving rig of this character which can be made up of available vibratory and impact driving units of proved and accepted design.

In accomplishing the above and other desirable objects, impact and vibratory hammers of proved ability have been combined in independently usable form by mounting impact and vibratory hammer units in side by side relation on parallel leads in laterally offset relation on the same leads frame, with load lines independently supporting the two hammer units, enabling either unit thus to be centered over the work and otherwise controlled from the crane.

The invention thus makes possible the fast driving of piling by vibratory action and the overcoming of any subsurface obstruction by shifting the crane to center the impact hammer over the work and then using that to overcome the obstruction, and following that with resumption of faster driving by vibration.

Other novel features of the invention and further desirable results accomplished are set forth and will appear in the course of the following specification.

The drawings accompanying and forming part of the specification illustrate a present embodiment of the invention. Structure and relation of parts, however, may be modified and changed as regards the immediate illustration all within the true intent and scope of the invention as hereinafter defined and claimed.

FIG. 1 in the drawings is a side elevation of one of the combination vibratory and impact hammers.

FIG. 2 is a broken front elevation of the vibratory hammer and supporting structure, on a larger scale.

FIG. 3 is a broken horizontal sectional view on substantially the plane of line 33 of FIG. 2.

FIG. 4 is a broken side elevation of the sliding cradle which supports the vibrator.

FIG. 5 is an enlarged, broken longitudinal sectional view of one of the shock absorbing hangers for the vibrator.

In FIG. 1 there is illustrated a crane 5 of more or less usual form having a boom 6, carrying a leads frame 7, pivoted on the point of the boom at 8.

This leads frame differs from the usual construction in that it carries a forwardly extended head structure 9 mounting spaced sheaves 1i) and 11 for load lines 12 and 13 running to impact and vibratory hammer units 14, 15, independently operable in the leads frame.

This independence of the two forms of hammers is effected by having the-impact hammer unit 14 guided on the rails 16 within the leads frame and the vibratory hammer unit 15 guided on rails 17 on the outside of the frame in forwardly offset relation to the first set of leads.

In the illustration the outer leads 17 are carried by angularly extending brackets 18 projecting from the inner set of leads.

To avoid transmission of vibration back through the load connections, an arched frame or cradle 19 connected with line 13, is slidably engaged on the rails 17 "ice by having end claws 20 sliding over the same and the vibrator is suspended from this cradle by links in the form of bolt rods 21 anchored in sleeves 22 attached to the cradle and containing bushings 23 of rubber or other suitable shock absorbing material.

With this invention, the hammer action may be quickly changed from vibratory to impact or from impact to vibratory driving, as conditions require by simply shifting the crane or the boom of the crane to center one or the other hammer unit over the piling.

The hammer which is not in use at any particular time may be shifted on its leads so as to be out of the way of operations of the other hammer.

The invention has the advantage of utilizing units of proven worth. The two hammers, impact and vibratory, may be of constructions available on the market and leads frames presently in use may be converted to the dual operations by extending the head structure to carry the extra sheave and by mounting the second set of leads by extension brackets attached to the original leads.

The lower ends of the suspension rods 21 are shown in FIG. 2 as extended down through anchorage sleeves 24 attached to the top of the vibrator and as equipped with nuts 25 by which any necessary length adjustments can be effected.

FIG. 5 shows the buffer springs 23 as having metal liners 26, with flanges 27 held by nuts 28 on the upper ends of these liners, extended far enough to engage the mounting flanges 29 of sleeves 22 in case of overcompression or deterioration of the elastic material.

These flanges 27 on the shock absorbers thus provide a safety link in the suspension of the vibrator.

The load line 13 which supports the vibrator is shown as extending over a sheave 30 at the center of the supporting cradle.

The vibratory unit may be equipped with a hydraulic or other satisfactory form of clamp for securing it rigidly to the piling, as indicated at 31, FIGS. 1 and 2.

When not in action, the vibrator may be disconnected from the leads frame and possibly be lowered and set to one side by the crane, ready to be picked up when again needed for action.

The claws 20 at the ends of the cradle 19 are, for the purpose, shown separable at 32 with bolts 33 enabling ready separation and re-connection.

The ready separation of the vibrator from the leads frame is an advantage at times but the shock absorption mounting of the vibrator in the sliding cradle enables the vibrator to be kept when desired or necessary in the leads frame.

What is claimed is:

1. A hammer for driving by vibratory action or by 1mpact comprising a leads frame having means for mounting the same on the boom point of a crane enabling the driving center to be located by manipulation of the crane,

a set of leads on said frame for a vibratory hammer unit,

a set of leads for an impact hammer on said frame in parallel laterally offset relation with respect to said first leads,

a vibratory hammer unit on said first set of leads,

an impact hammer unit on said second set of leads and separate load lines on the frame to said vibratory and impact hammer units enabling either of said hammer units to be hoisted to inoperative position clear of the other hammer unit while said other hammer unit is in operation.

2. The invention according to claim 1 in which the leads for the impact hammer are inside the leads frame and said leads for the vibratory hammer unit are on the outside of the leads frame locating the vibratory unit With ample clearance in respect to the impact hammer and said vibratory hammer unit having a clamp at the lower end of the same for solid gripping engagement with piling.

3. The invention according to claim 1 with vibration absorbing coupling means interposed in said load line to the vibratory hammer unit.

4. The invention according to claim 3 with said vibration absorbing means including sleeves connected with said vibratory hammer unit, suspension links extending through said sleeves and bushings of elastic vibration absorbing material confined in said sleeves about said links.

5. The invention according to claim 4, with flanges carried by said suspension links and supporting abutments engageable by said flanges on failure of said elastic vibration absorbing material.

6. The invention according to claim 1 in which said vibratory hammer unit includes a cradle slidingly engaged on said first set of leads and vibration absorbing means on said cradle.

7. A hammer for driving by vibratory action or by impact, comprising a leads frame open along one side,

guide rails within said frame for an impact hammer,

brackets extending from said guide rails at opposite edges of the opening in said leads frame,

a second set of guide rails mounted on said brackets and a vibratory hammer mounted on said second set of guide rails.

References Cited by the Examiner UNITED STATES PATENTS FRED C. MATTERN, JR., Primary Examiner. L. P. KESSLER, Assistant Examiner. 

7. A HAMMER FOR DRIVING BY VIBRATORY ACTION OR BY IMPACT, COMPRISING A LEADS FRAME OPEN ALONG ONE SIDE, GUIDE RAILS WITHIN SAID FRAME FOR AN IMPACT HAMMER, BRACKETS EXTENDING FROM SAID GUIDE RAILS AT OPPOSITE EDGES OF THE OPENING IN SAID LEADS FRAME, A SECOND SET OF GUIDE RAILS MOUNTED ON SAID BRACKET AND A VIBRATORY HAMMER MOUNTED ON SAID SECOND SET OF GUIDE RAILS. 